Across
- 2. When planetesimals collide they form
- 4. How many years does this take
- 6. What do stars make
- 8. What is the smallest planet
- 9. What are Nebulae make of
- 12. What is between the Mars and Jupiter
- 14. What do H and He form
Down
- 1. What was the first element
- 2. When the dust clump collide they form
- 3. Where did the universe come from
- 5. Who named the planets
- 7. What is our star
- 10. What was the second element
- 11. How many planets are there
- 13. What does A collapsing cloud form first